Design and Analysis of Non-mechanical Beam-steering Space Laser Communication Receiver System
The use of non-mechanical beam-steering structures offers the potential for significant reduction in the size and weight of space laser communication systems. However,mature non-mechanical beam-steering space laser communication receiver systems have not yet been realized due to limitations in existing devices. This study proposes an optical system for space laser communication reception based on orthogonal cascade liquid crystal polarization gratings (OC-LCPGs) and four-quadrant detectors (4QDs). Considering the theoretical and performance characteristics of OC-LCPGs and 4QDs,the proposed optical system is designed considering the advantages of OC-LCPGs,such as compact size,large aperture,and wide deflection range,combined with the large angle reception capabilities of 4QDs. According to the theory and device performance of quadrature liquid crystal cascade polarization grating and four-quadrant detector,the optical system is designed. Furthermore,the influence of detector noise,background noise,and system noise on communication and incident angle measurements of the optical system is analysed. Additionally,we propose a calculation method for achievable commu-nication rate,and we analyze the maximum response angular velocity of the system.
space laser communicationliquid crystal polarization gratingsfour-quadrant detectorsnoiseresponse angular velocity
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